JPH11344536A - Inspection pin and inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection device which is easy to inspect a printed circuit board of different specification and ready for operation in a short time preparation. SOLUTION: In a inspection pin 13 to be used for an inspection device, a probe body 16 comprising a probe 22 in contact with a through hole 49 in a printed circuit board 11, an inner cylinder 21 in which the probe 22 is slidably stored, a spring 25 to externally urge the prove 22 stored in the inner cylinder 21, and a socket 20 to be externally fitted to the inner cylinder 21 is stored in a body part 17 through an insulation body 19. A lower end of the socket 20 is electrically connected to a connection line 26 of a cord 23 to be inserted to a lower part of the body part 17. A magnet 24 is mounted inside a leg part 18 at a lower part of the body part 17, the inspection pin 13 is easily attached/ detached to/from an iron plate 12, and can be easily moved to a desired position to the through hole 49 in the printed circuit board 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an inspection pin and an inspection jig, and more particularly to an inspection pin and an inspection jig for electrically inspecting a circuit pattern on a printed circuit board.

[0002]

2. Description of the Related Art FIG. 9 is a schematic sectional view of a conventional apparatus for inspecting a printed circuit board, and FIG. 10 is an enlarged sectional view of the probe shown in FIG. Referring to these drawings, an acrylic plate 45 having a size corresponding to the size of printed circuit board 11 to be inspected is prepared, and a plurality of sockets corresponding to each of inspection pins 13 to be attached are provided on acrylic plate 45. A hole 46 is formed. The inspection pin 13 includes an inner cylinder 21 for slidably storing the probe 22 and a socket 2 provided with a flange on the side of the probe 22 that is fitted to the inner cylinder 21.
0 and a cord 47 attached to the lower end of the socket 20 by caulking and electrically connected to the probe 22. The cord 47 connected to each inspection pin 13 is connected to a predetermined portion of a switching circuit 48 provided on the lower surface of the acrylic plate 45.

In the inspection apparatus configured as described above, at the time of inspection, the printed circuit board 11 descends.
Then, as shown in FIG.
1 through-hole 49 formed according to the circuit pattern
And the probe 22 of the corresponding test pin 13 comes into contact with
In this state, the circuit pattern of the printed circuit board 11 is inspected by supplying electricity to the probe 22 via the switching circuit 48.

[0004]

By the way, printed circuit boards to be inspected are not always of the same specifications, and many types of printed boards having different specifications are often inspected by the same inspection apparatus. In this case, it is necessary to replace many test pins 13 according to a change in the address or area of the printed circuit board to be tested.

However, in the conventional inspection apparatus, the socket 20 cannot be pulled out to the cord 47 side because the flange of the socket 20 exists on the surface side of the acrylic plate 45. That is, the socket 20 and the cord 47
Is fixed by caulking, so when the inspection pin 13 is replaced, the code 47 and the switching circuit 4
8 and disconnect the inspection pin 13 from the acrylic plate 45.
And re-point to a new socket hole 46. When the number of the inspection pins 13 to be replaced is large, the operation has a long time.

Further, the socket hole 46 is provided with the inspection pin 13.
It is necessary to fit firmly into the socket 20 of
A high precision of the opening shape is required. Therefore,
Acrylic plate 45 matched to printed circuit board 11 to be inspected
It took a long time to prepare such a device, which increased its manufacturing cost. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an inspection pin and an inspection jig which can easily respond to inspection of printed circuit boards having different specifications in a short time. Aim.

[0007]

According to one aspect of the present invention, there is provided an inspection pin for a printed circuit board for electronic equipment, which is detachably mounted on a magnetic body. , Including a probe, a body made of a conductive material, a body for storing the probe in an insulated state, a magnet mounted on the lower surface of the body, and mounted through the body and electrically connected to the probe. Code.

[0008] With this configuration, since the magnet is provided below the body, the inspection pin can be fixed on the magnetic body and detached from the magnetic body. According to a second aspect of the present invention, in the configuration of the first aspect,
The probe body has a cylindrical inner cylinder in which a part of the probe body is slidably stored, a spring mounted in the inner cylinder, and urging the probe outward with respect to the inner cylinder, and an inner cylinder. And a cylindrical socket that fits over the outside.

With this configuration, it is possible to use a conventional inspection pin as a probe. According to a third aspect of the present invention, in the configuration of the second aspect,
An insulator is filled between the probe body and the body. With this configuration, a stable insulating state between the probe body and the body is ensured.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, a plurality of probe bodies are provided and housed in the body in a mutually insulated state.
A plurality of cords are provided for each of the probe bodies. With this configuration, the probe bodies can be arranged close to each other.

According to a fifth aspect of the present invention, there is provided an inspection jig for a printed circuit board for an electronic device, wherein the inspection body has a flat plate-shaped magnetic body and a plurality of inspection jigs which are detachably fixed on the magnetic body by magnetic force. It is provided with a pin. With this configuration, the inspection pin can be detachably fixed by magnetic force, and can be arranged at an arbitrary position.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect of the present invention, a size is provided on the magnetic body and corresponds to the installation portion of the inspection pin at each position where the inspection pin is to be installed. And a positioning plate in which a positioning opening is formed. With this configuration,
A portion around the portion where the inspection pin is mounted on the magnetic body is surrounded by the positioning plate, thereby preventing the inspection pin from being inadvertently moved in the horizontal direction.

According to a seventh aspect of the present invention, in the configuration of the fifth aspect of the present invention, a plurality of positioning means for fixing a horizontal position of the printed circuit board to be inspected is detachably fixed on the magnetic body by a magnetic force. A pin is further provided, and the inspection pin is fixed to the magnetic body at a predetermined position with respect to the positioning pin. With this configuration, the positioning pins can be easily fixed even if the set position of the printed circuit board to be inspected with respect to the magnetic body is shifted.

According to an eighth aspect of the present invention, in the configuration of the seventh aspect, the load on each of the inspection pins of the printed circuit board to be inspected is detachably fixed on the magnetic body by a magnetic force so as to equalize. And a plurality of adjustment pins for supporting the printed circuit board. With this configuration, the adjustment pins can be fixed at desired positions with respect to the printed circuit board to be inspected.

[0015]

As described above, according to the first aspect of the present invention, the inspection pin can be freely fixed to and detached from the magnetic body, so that the inspection pin can be moved in the horizontal direction without removing the cord. Becomes free. Therefore, it is possible to arrange the inspection pins at desired positions according to the printed circuit board in a short time and easily.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since a conventional inspection pin can be used as a probe, there is no need to manufacture a new probe and the cost is reduced. This is advantageous in terms of efficiency. Claim 3
According to the invention described above, in addition to the effect of the invention described in claim 2, a stable insulating state between the probe body and the body is ensured, so that the range of choice of the material of the body can be expanded.

According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, since the probe bodies can be arranged close to each other, high integration is achieved. Inspection of printed circuit boards can be easily performed. According to the fifth aspect of the present invention, since the inspection pin can be detachably fixed to the magnetic body, the inspection pin can easily correspond to the printed circuit board to be inspected.

According to a sixth aspect of the present invention, in addition to the effect of the fifth aspect, the inspection pin is surrounded by the positioning plate, so that the inspection pin is more stably fixed to the magnetic body. By preparing the positioning plate in advance according to the printed circuit board to be inspected, the arrangement of the inspection pins can be more quickly changed according to the change of the printed circuit board. Further, since the positioning opening does not require the same accuracy as a socket hole in a conventional inspection jig, the manufacturing of the positioning plate becomes easy and the cost is advantageous.

According to the seventh aspect of the invention, in addition to the effect of the fifth aspect, the positioning pins can be easily fixed in accordance with the printed circuit board. An inspection jig corresponding to a printed circuit board to be inspected can be easily manufactured. According to the invention described in claim 8, in addition to the effect of the invention described in claim 7, the adjustment pin can be easily moved to a desired position in accordance with the weight distribution, size, etc. of the inspection printed circuit board. Improve the reliability of inspection jigs.

[0020]

FIG. 1 is a diagram showing a schematic configuration of an inspection jig according to a first embodiment of the present invention. Referring to the figure, an iron plate (magnetic material) 12 having a size corresponding to a printed circuit board 11 to be inspected is prepared, and a plurality of inspection pins 13, positioning pins 14 and adjustment pins 15 are provided on the iron plate 12. It is placed. The code 23 is connected to each of the inspection pins 13, but each of the inspection pins 13 does not penetrate the iron plate 12 like the acrylic plate 45 shown in the conventional example, and all of the inspection pins 13 are placed on the iron plate 12. It has been placed. Therefore, the cord 23 connected to the inspection pin 13 is also arranged on the iron plate 12.

FIG. 2 is a perspective view showing an external shape of the inspection pin 13 shown in FIG. 1, and FIG. 3 is a schematic enlarged sectional view of the inspection pin 13. Referring to these figures,
The probe body 16 includes a probe 22 made of a conductive material having a round bar shape and a tip having a conical shape, an inner cylinder 21 made of a cylindrical conductive material for slidably storing the probe 22, and an inner cylinder. 21 at the bottom of the probe 2
2 for urging the inner cylinder 2 outward from the inner cylinder 21
5 and a socket 20 made of a conductive material and having a cylindrical shape fitted externally to the inner cylinder 21 and having a flange formed on the distal end side of the probe 22. The probe 16 is integrally housed in a cylindrical body 17, and an insulator 19 is filled between the probe 16 and the body 17. As a result, an insulating state between the probe body 16 and the body 17 is ensured, so that the material of the body 17 may be a conductive material, and the range of choice can be expanded. The lower part of the body 17
Once expanded, it is connected to the cylindrical leg 18. Leg 1
A disk-shaped magnet 24 is fixed inside 8.

The lower end of the socket 20 is connected to the connection line 26 of the inserted cord 23 through a cord opening 41 formed below the body 17, and the socket 20 is electrically connected to the outside through the cord 23. It becomes electrically conductive. Since the socket 20, the inner cylinder 21, and the probe 22 are all made of a conductive material and are in contact with each other, the probe 22 is electrically connected to the outside.

Since the inspection pin 13 is configured as described above, it can be fixed to and removed from the iron plate 12 by the magnetic force of the magnet 24. Inspection pin 1
Since the cord 3 is provided outside the body 17 in the body 3, the inspection pin 13 may be moved together with the cord 23 when the inspection pin 13 is moved. Thus, the printed circuit board 11
The inspection pin 13 can be easily fixed to a desired position on the iron plate 12 such that the probe 22 is positioned with respect to the predetermined through hole 49.

FIG. 4 shows the positioning pin 14 shown in FIG.
It is a perspective view which shows schematic shape of. Referring to the figure, positioning pin 14 is connected to a cylindrical body 29, a rod-shaped positioning rod 30 connected to one end of body 29 and having a diameter smaller than the diameter of body 29, and connected to the other end of body 29. The torso 2
And a leg 31 having a columnar shape having a diameter larger than the diameter of No. 9. Inside the leg 31, a disk-shaped magnet 32 is attached in the same manner as the above-described positioning pin.

As shown in FIG. 1, the positioning pin 14 sets the position of the printed circuit board 11 by penetrating a positioning rod 30 into a positioning hole formed in the printed circuit board 11. Since the magnet 32 is attached to the lower portion of the positioning pin 14, the positioning pin 14 can be easily fixed to and removed from the iron plate 12. Therefore, when the printed board 11 to be inspected is changed to one having another specification, the positioning pins 14 are easily moved to the positions of the positioning holes (not shown) formed in the printed board 11. be able to. Then, the position of the inspection pin 13 is determined based on the position of the moved positioning pin 14 and is fixed to the iron plate 12.
The position of the inspection pin 13 can be easily and surely made to correspond to the position of the through hole 49 corresponding to the one circuit.

FIG. 5 is a perspective view showing a schematic shape of the adjustment pin 15 shown in FIG. Referring to the drawing, the structure of the adjustment pin 15 is such that the shape of the adjustment rod 39 and the cord 23 connected to the body 17 in the inspection pin 13 are the body portion 34.
The structure is basically the same as that of the inspection pin 13 except that the inspection pin 13 is not mounted on the inspection pin 13. As shown in FIG. 1, the adjustment pins 15 are moved with respect to each of the inspection pins 13 by weight distribution and size of the printed circuit board 11 in a state where the printed circuit board 11 to be inspected is moved downward. It is arranged to balance the weight of the printed circuit board 11 so that an uneven load is not applied. Therefore, although the adjustment rod 39 is slidable with respect to the inner cylinder 38 and constantly urged outward from the inner cylinder 38, the tip thereof has a flat surface in order to easily receive the load of the printed circuit board 11. It has a shape. Further, since it is not necessary to electrically conduct the adjustment rod 39, it is not necessary to provide a cord for establishing an electrical connection with the outside.

As described above, since the adjustment pin 15 can be easily fixed to and removed from the iron plate 12 by the magnetic force of the magnet 40, it can be easily moved to a desired position. That is, even if the specifications of the printed circuit board 11 to be inspected are different and the weight distribution is different, the load applied to the inspection pin 13 is reduced by moving the adjustment pin 15 to a desired position accordingly. Uniform and inspection pin 1
Inspection reliability of No. 3 can be improved.

FIG. 6 is a sectional view showing a schematic structure of an inspection jig according to a second embodiment of the present invention. Referring to the figure, an acrylic plate 27 is placed on the upper surface of iron plate 12, and a positioning opening 28 slightly larger than the outer shape of leg 18 is formed in acrylic plate 27. The positioning openings 28 are also formed in the acrylic plate 27 for the positioning pins 14 and the adjustment pins 15.

Although not shown, the acrylic plate 27 is fixed to the iron plate 12 so as not to move in the horizontal direction. With such a configuration, the horizontal movement of the inspection pin 13 fixed to the iron plate 12 by the magnetic force of the magnet 24 can be achieved by the positioning opening 28 of the acrylic plate 27 in addition to the magnetic force of the magnet 24. Since this is prevented, more stable fixation to the iron plate 12 becomes possible. Similarly, by attaching the acrylic plate 27 to the positioning pins 14 and the adjustment pins 15, more stable fixing to the iron plate 12 becomes possible.

Incidentally, in the second embodiment,
The iron plate 12 is made of a magnetic material.
Is fixed to the iron plate 12. However, instead of this, even if the iron plate 12 is changed to a non-magnetic material and the magnet 24 is not provided under the inspection pin 13, the acrylic plate 27 is attached to the non-magnetic material, The inspection pin 13 can be set at a predetermined position in accordance with the positioning opening 28.

The acrylic plate 27 is connected to the legs 18 as described above.
Since the diameter may be slightly larger than the outer shape of the above, there is no need to form the socket hole 46 with high accuracy as shown in the conventional example of FIG. 10, so that the acrylic plate 27 can be manufactured at low cost. Note that another synthetic resin plate or the like may be used instead of the acrylic plate. FIG. 7 is a sectional view showing a schematic structure of an inspection pin in an inspection jig according to a third embodiment of the present invention. FIG. 8 is a plan view of the inspection pin of FIG. FIG.

Referring to these figures, five sets of probe bodies 16a to 16e are housed in a cylindrical body 17 having a long-hole cross section, and an insulating material is provided between these and the inner surface of the body 17. The body 19 is filled. Probe body 16a-16e
Are the same shape and the same material as the probe body 16 in the first embodiment. That is, the probe body 16a
Are a probe 22a for electrically connecting to the through hole 49 of the printed circuit board 11, an inner cylinder 21a in which the probe 22a is slidably stored, and a probe 22a stored in the bottom of the inner cylinder 21a. And a socket 20a externally fitted to the inner cylinder 21a. The lower portion of the body 17 is continuous with a leg 18 that once spreads and extends downward.
An elongated magnet 24 is attached to the inside of the magnet 8. In the lower part of the body 17, probe bodies 16a-1
6e, the cords 23a to 23e connected to the respective sockets 20a to 20e are inserted.
0e, that is, each of the probes 22a to 22e can be electrically connected to the outside.

With such a configuration, the pitch P of the adjacent probes 22 can be made smaller than that of the inspection pin 13 according to the first embodiment shown in FIG. That is, the inspection pin 1 according to this embodiment
According to 3, it is possible to cope with the inspection of the printed circuit board 11 which is more integrated. In this embodiment, five sets of probe pins 16 are arranged in a row in a row, but the number of sets is not limited to this, and a plurality of rows may be provided in the horizontal direction. Is also possible. At the time of inspection, power is supplied via the cord 23 only to the probe 16 that needs to be in an electrically conductive state according to the specifications of the printed circuit board 11, and power is supplied to the other probes 16 through the corresponding cord 23. If the supply is stopped, the more highly integrated printed circuit board 11
Can be inspected.

In each of the above embodiments, the body 17
Although the leg 18 having a larger diameter is formed, the magnet 24 may be attached to the lower part of the body 17 without providing such a leg. Further, in each of the above embodiments,
Although the magnet 24 is mounted separately from the body 17 and the legs 18, the body 17 and the legs 18 themselves may be made of a magnetic material having a magnet function.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an inspection jig according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic shape of the inspection pin 13 shown in FIG.

FIG. 3 is an enlarged sectional view showing an internal structure of the inspection pin 13 shown in FIG.

FIG. 4 is a perspective view showing a schematic shape of a positioning pin 14 shown in FIG.

FIG. 5 is a perspective view showing a schematic shape of an adjustment pin 15 shown in FIG.

FIG. 6 is a cross-sectional view of a part of an inspection jig according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing an internal structure of an inspection pin used in an inspection jig according to a third embodiment of the present invention.

8 is a plan view of the inspection pin shown in FIG.

FIG. 9 is a schematic sectional view of a conventional printed circuit board inspection apparatus.

FIG. 10 is an enlarged sectional view of the probe shown in FIG. 9;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Printed circuit board 21 ... Inner cylinder 12 ... Iron plate 22 ... Probe 13 ... Inspection pin 23 ... Cord 14 ... Positioning pin 24 ... Magnet 15 ... Adjustment Pin 25: Spring 16: Probe 27: Acrylic plate 17: Body 28: Positioning opening 19: Insulator 32: Magnet 20: Socket 40: Magnets The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (8)

[Claims] 1. An inspection pin for a printed circuit board for an electronic device, which is detachably mounted on a magnetic body, comprising a probe, including a probe, made of a conductor, and storing the probe in an insulated state. An inspection pin, comprising: a body to be mounted; a magnet attached to a lower surface of the body; and a cord mounted to penetrate the body and electrically connected to the probe body. 2. The probe according to claim 1, wherein the probe has a tubular inner cylinder in which a part of the probe is slidably housed, and is mounted in the inner cylinder, and the probe is moved outward with respect to the inner cylinder. The inspection pin according to claim 1, further comprising: a spring biased toward the inner cylinder; and a cylindrical socket externally fitted to the inner cylinder. 3. The inspection pin according to claim 2, wherein an insulator is filled between the probe body and the body. 4. The probe according to claim 1, wherein a plurality of said probe bodies are provided and stored in said body in a mutually insulated state, and a plurality of said cords are provided corresponding to each of said probe bodies. Inspection pin described in 1. 5. An inspection jig for an electronic device printed circuit board, comprising: a magnetic body having a flat plate shape; and a plurality of inspection pins detachably fixed on the magnetic body by magnetic force. , Inspection jig. 6. A positioning plate installed on the magnetic body and having a positioning opening having a size corresponding to the installation portion of the inspection pin is formed at each position where the inspection pin is to be installed. The inspection jig according to claim 5, further comprising: 7. A plurality of positioning pins which are detachably fixed on the magnetic body by magnetic force and fix a horizontal position of a printed circuit board to be inspected, wherein the inspection pins are based on the positioning pins. The inspection jig according to claim 5, wherein the inspection jig is fixed to the magnetic body at a predetermined position. 8. A plurality of adjustment pins, which are detachably fixed on the magnetic body by magnetic force and support the printed circuit board so as to equalize the load on each of the inspection pins of the printed circuit board to be inspected. The inspection jig according to claim 7, further comprising: